Rendering on the exterior walls of building is generally used as an alternative to brick or concrete blocks.
Note. While dry render is paintable care should be taken as to the quality and nature of the work.
If in doubt regarding the condition and product suitability of a coatings to applied advice from the manufacture should be obtained.
Note: Exterior Render is made from 6 parts Sharp Sand 1part Portland Cement and one part Lime 6:1:1.
Lime is added as a plasticiser which makes it easier to work with. The addition of lime can weaken the overall strength of the render making it more porous.
In place of lime, suppliers now offer liquid plasticisers. 